So I've gone through two different skulls in my tank. The paint on both was flaking off within a month. The first was from Walmart so I wasn't surprised, but the second was from PetCo. (I ordered it off amazon but it was the same brand.)
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Does anyone have a skull cave that is surviving?
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I'd love to find another one to fill the now empty space in the front of my tank. I loved the look of it when it was new.
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I still have my PetCo skull. I could potentially repaint after it dries out. If I do, I will be coating the entire thing with a layer of aquarium sealant.
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Any thoughts, ideas, comments, links to new skulls, etc.?

My room mate had a human skull shaped decoration in her fish tank and its still kicking pretty well I believe she got it at Petco. I have a animal skull decor in one of mine but I got it at Petsmart. What color was your skull? White or grey? Do you have a picture? :) If you dont have the same one I can send you the link to the one she had.